Collapsible winder shaft



ll... HOWE COLLAPSiBLE WINDER SHAFT Filed May 15, 193 -1 INVENTUR L. HOWE.

Patented Apr. 7, 1936 STATES was PATENT QFFIQE Application May 15, 1934, Serial No. 725,763 In Canada May 16, 1933 2 Claims.

The invention relates to a collapsible winder shaft, as described in the present specification and illustrated in the accompanying drawing that forms part of the same.

The invention consists essentially in the parts in the operating mechanism accomplishing a continuity in the perimeter as pointed out in the claims for novelty following a description in detail of the preferred construction.

The objects of the invention are to provide a collapsible shaft for use in the paper industry. A great deal of winding and rewinding of paper is done in the producing of rolls of different lengths and widths as required for commercial use. It is desirable that the shafts in which paper is wound can be removed at the completion of the winding of the roll. Collapsible shafts have been used for this purpose for some time, but they all have one serious objection in the method of expanding the parts that separate, thereby producing in the perimeter of the shaft two or more openings into each of which the layers of paper are pressed by the tension under which they are placed in the roll. This produces a bulge of the paper inwardly at each opening in the shaft on which the short edges of the separated parts of the shaft lie when it is being removed. These bulges also interfere with the insertion of other shafts when it is desired to place the roll in some machine for its ultimate use. The objections to the collapsible shafts heretofore used have been eliminated in this invention by the design of the expanders which increase the diameter of the shaft and at the same time completely supply the extra increase in the circumference of the shaft so that the extending shaft has a continuous perimeter, and to all intents and purposes, has the same advantages as a solid shaft which is the object of this invention.

In the drawing, Figure l is an elevational View of the paper rewinding machine with the collapsible shaft in place preparatory to attaching the paper for winding.

Figure 2 shows the rewinding machine with the completely rewound roll of. the collapsible shaft.

Figure 3 is a longitudinal cross section on the line 3-3 in Figure 8 of one end of the collapsible shaft showing the shaft in its expanded condition.

Figure 4 is a corresponding view on the line 4-4 in Figure 9 showing the shaft in the collapsed condition.

Figure 5 is an elevation of the other end of the same shaft.

Figure 6 is a cross section taken on the line 66 shown in Figure 5.

Figure '7 is an end view of the whole shaft.

Figure 8 is a cross section taken on the line 6-8 in Figure 3 of the whole shaft.

Figure 9 is a cross section taken on the line 9-9 in Figure 4.

Like numerals of reference indicate corresponding parts in the various figures.

Referring to the drawing. the collapsible shaft I5 is placed on the rolls l6 and the end of the paper from the mill roll IT is attached thereto and revolved to Wind up the paper to the extent desired as shown in Figure 2.

The longitudinal continuous frame l8 forming threaded shaft and sections extends from end to end of the collapsible shaft having the circular ends 19 for use in a bearing for rotating the shaft and the threaded portion 2% also at each end.

i The shoulders 2! at the ends of the threaded portions 20 serve as stops to limit the movement of the threaded collar or operating nut 22. The threaded collar or operating nut .22. has holes 36 spaced around its circumference for the application of the turning device. Between the shoulders 2! the central shaft or spacing central stem I8 is of uniform cylindrical shape having slots 23 diametrically opposed.

The bed of the slots 23 is humped at regular intervals. The cams are symmetrically disposed in each slot as shown in the typical detail as indicated by numerals 24.

The collars 25 are loosely fitted on the longitudinal continuous frame and retain their position against the longitudinal or sheath sections 26 and 21 and the wedge members or sliding filler strips 28 by means of the threaded collars or operating nuts 22.

The longitudinal or sheath sections 25 and 21 are placed tightly together to form an unbroken cylinder of the same diameter as the collars 25. They are loosely held to the longitudinal continuous frame 18 at intervals along the shaft and independent of one another by means of the pins 29.

The pins 29 are fastened rigidly at one end 30 to the longitudinal section and extend freely 7 through the continuous frame and terminate in a head 3| which prevents the removal of the longitudinal or sheath section from the continuous frame.

The pins are of sufficient length to permit the extension of the longitudinal sections. The pins 29 are so placed in the longitudinal or sheath sections 26 and 21 that they coincide with the location of the cams 24 on the central shaft. These cams enclose slotted holes which permit longitudinal motion of the pins, and consequently the section with reference to the longitudinal continuous frame.

The wedge members or sliding filler strips 28 have on their inner face cams 33 located to cooperate with the cams 24 on the continuous frame in producing the movement of the wedges or filler strips required to expand or contract the sections 26 and 21.

The wedge members or filler strips 28 have on their outer face a continuous tongue 34 rising from the shoulders 35. The tongue moves with the wedge members or filler strips in the slot 23 to separate the longitudinal sections 26 and 2'! and completely occupy the space formed by the separation.

In the operation of this device, the shaft is expanded for the applying of the paper by rotating the threaded collar 22 on the threaded portion of the longitudinal continuous frame I8 to produce a movement of the wedge members or sliding filler strips 28 with reference to the central shaft and bring the cams of the two members in opposed positions.

This will produce the outward motion of the wedge members or filler strips and will separate the two longitudinal or sheath sections 26 and 21 by means of the wedging action of the tongue 34 at their longitudinal edges after the winding of the roll has been completed or whenever it is desired to remove the collapsible shaft from the roll the operation is reversed. The threaded collars are rotated in opposite directions causing the movement of the continuous frame and the edges, thereby moving their respective cams from an opposed position to a free position, which will permit the: inward motion of the wedges.

The wedges or filler strips then being removed from between the longitudinal or sheath sections, will offer no resistance to the reduction in the outside diameter of the shaft by the closing up of the two longitudinal sections.

The important feature of the operation is that in the collapsed condition, the two longitudinal or sheath sections move together to produce a continuous shaft with no slots or grooves in its face. It is to all intents and purposes a solid shaft which will not mar the roll of paper, and its removal.

The preferred construction is shown in the drawing, and described. It is obvious that various changes may be made in the details illustrated without departing from the spirit of the invention as expressed in the claims.

What I claim is:-

l. A collapsible winder shaft comprising a frame forming threaded shaft end sections, intermediate shaft contour sections and a spacing central stem having slotted rising cam surfaces, sheath sections mounted on said contours, pins locking said sheaths to said contours in the outer and inner positions, sliding filler strips riding on said stem and having cooperating cam surfaces and locking runners, collars engaging said sliding fillers and operating nuts on said threaded shaft sections engaging said collars.

2. A collapsible winder shaft comprising a frame forming threaded shaft end sections, intermediate shaft contour sections and a spacing central stem having slotted rising cam surfaces, sheath sections individually mounted on said contours, pins fixedly secured to said sheath sections and held freely in the slots of the spacing central stem, sliding filler strips riding in said stem and having on their outer faces continuous tongues rising from shoulders and on their inner faces cooperating cam surfaces, collars engaging said sliding filler strips and. operating nuts on said threaded shaft sections engaging said collars.

LEWIS HOWE. 

